"I want a dog's tail," you say confidently. "It's not that I wanna be a dog, but I wonder what it's like to have a tail."
The genie rolls her eyes. It's actually not the strangest wish she's heard. It's always surprising what actually happens when you give people wishes.
"Fine," she says.
Immediately you feel an intense pain shoot down your back and scream. It's like every bone in your back just shifted. Then you feel a rumbling at the base of your spine and another jolt down your back. You feel something totally new to you and look back to see something small and pointed twitching inside your pants. Another jolt and you lean forward wincing as you feel a strain between your butt cheeks.
"Oh snap!" you think to yourself. "This is really happening." You're suddenly no longer sure that you want it to.
The pressure builds and finally a tearing sound comes from your pants and something snakes through. You feel a breeze behind you and a rush of relief.
Not daring to look back, you reach a hand behind you and feel your wrist brush against a part of you which is at least as long as your forearm. As it makes contact and as your hand closes around it you can feel the fur. Real, canine fur.
Eyes wide, you finally turn around and have a look. There it is, sticking out of your own pants: a long pointy dog's tail with short dark fur and a white patch at the tip.
Your heart pounds fearful of what you just did to your body. You feel a jerk in your new tail as it dives out of your soft grasp to duck between your legs.
You close your eyes and then give a pleading look back to the genie.
"Take it back! I don't want it anymore. I wish..."
"Oh, no you don't, not yet anyway," the genie interrupts. "I'm not gonna let you waste TWO wishes on that thing in under two minutes. I'm leaving. Think long and hard about what you did and what you want your second wish to be. I'll see you tomorrow." She vanishes.
You rub the lamp vigorously, tail pressed firmly under your crotch. It's no use though, the genie isn't coming back out.